CN100423700C - Intramedullary nail - Google Patents

Intramedullary nail Download PDF

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Publication number
CN100423700C
CN100423700C CNB200380110566XA CN200380110566A CN100423700C CN 100423700 C CN100423700 C CN 100423700C CN B200380110566X A CNB200380110566X A CN B200380110566XA CN 200380110566 A CN200380110566 A CN 200380110566A CN 100423700 C CN100423700 C CN 100423700C
Authority
CN
China
Prior art keywords
length
intramedullary pin
central axis
distally
scope
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB200380110566XA
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Chinese (zh)
Other versions
CN1859879A (en
Inventor
A·施林格
M·比特勒
P·森恩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AO Technology AG
Original Assignee
Synthes USA LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Synthes USA LLC filed Critical Synthes USA LLC
Publication of CN1859879A publication Critical patent/CN1859879A/en
Application granted granted Critical
Publication of CN100423700C publication Critical patent/CN100423700C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary pins, nails or other devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor

Abstract

The present invention relates to an intramedullary nail (1) especially used for shinbones. The intramedullary nail comprises a nearby end (2), a distant end (3) and a central axis (6), wherein the distant end (3) is suitable to be inserted into a medullary cavity. The intramedullary nail (1) is 200 to 500mm in total length L and has an arc section (4) with the length G (G is smaller than or equal to L). The arc section (4) with the length G has a curvature radius R within the range of 300 to 1300mm, and the ratio of L to R is 0.2 to 0.8: 1.

Description

Intramedullary pin
Technical field
The present invention relates to a kind of intramedullary pin, be used in particular for tibia.
Background technology
By known a kind of this type of the intramedullary pin of CH-A 674 613, it has the end of a nearside and the end in a distally, and these two parts divide bending to go out from central division.It is the curvature of 220mm that can there be a maximum radius end of nearside.
Because tibia is different by its person's character to each patient and has different length especially and tibial plateau size (they are relative to each other) that intramedullary pin also should have according to adjustable length parameter.Therefore one fixed to all intramedullary pins all effectively radius of curvature do not optimize for implanting because this causes the consumption power that increases and the loss of the reduced operation that causes improving.
Summary of the invention
The present invention here will eliminate these drawbacks.The objective of the invention is to, a kind of intramedullary pin is provided, it considers that tibia is with respect to anatomical ratio of its length and extend with respect to its pulp cavity especially and optimize.
The present invention utilizes a kind of intramedullary pin to reach the purpose of proposition, and this intramedullary pin comprises that being applicable to of the end of a nearside, a distally is inserted into end and the central axis in the pulp cavity, and this intramedullary pin has a total length L in 200 to 500mm scopes; And arch section with a length G≤L; It is characterized in that the arch section of length G has a radius of curvature R in the 300-1300mm scope; Ratio L/R is in 0.2 to 0.8 scope; And the end in distally constitutes the straight line portion of " the l "≤L that has length.
The advantage that reaches by the present invention is basically, because according to intramedullary pin of the present invention:
A) under the situation of some indication, special under the situation of the technology of not holing, reduce implantation power;
B) produce less reduced operation loss by less implantation power;
C) after finishing implantation, intramedullary pin is in the position of the bio-mechanical coideal in the pulp cavity;
D) in case intramedullary pin is run into rear wall in implantation process, its curvature just become effectively (in the prior art intramedullary pin this point must or crooked or must stand the loss of reduced operation).
In a kind of special form of implementation, the end in the distally of intramedullary pin constitutes the straight line portion of length " l "≤L.Produce various advantages whereby, that is:
A) consistent with the axis of bio-mechanical;
B) probability of a kind of fracture of distally nursing and do not have the reduced operation loss; And
C) avoid the displacement of the bone fragments in distally.
The length of the end in the distally of intramedullary pin " l " conforms with destination in the scope of 0.20L to 0.55L, preferably in the scope of 0.25L to 0.50L.
In a kind of special form of implementation, form one between the arch section of intramedullary pin and the straight line portion in 7 ° of-12 ° of scopes and preferred angle α in 8 ° of-9 ° of scopes.End and special radius of curvature with the distally produce an intramedullary pin position of optimizing with respect to the entrance of intramedullary pin in pulp cavity.
In a kind of special form of implementation, the cross section perpendicular to central axis of intramedullary pin constitutes non-circular and preferred avette or oval-shaped.Intramedullary pin can be inserted in the pulp cavity more deeply whereby, up to leaning against on the rear wall.
In another kind of form of implementation, intramedullary pin have one coaxial in vertical hole 7 of central axis.This can insert intramedullary pin via guiding steel wire, and this guiding steel cable also can be used for the surgical technic of holing.
In another kind of form of implementation, the end of the nearside of intramedullary pin constitutes the straight line portion of length P≤L.This brings the advantage of production technology.The length P of the end of nearside conforms with destination in the scope of 1/6L to 1/3L.
In another kind of form of implementation, at the region memory of the end of nearside at least one lock hole that extends transverse to central axis.
In another kind of form of implementation, at the region memory of the end in distally at least one lock hole that extends transverse to central axis.When adopting a locking member that inserts by lock hole, not only realize a kind of fixed-site in axial direction, promptly anti-axial dislocation is fixing, and realizes that a kind of rotation fixes promptly anti-the fixing of dislocation that reverse.
In another case, the radius of curvature R of arch section is in 350 to 1200mm scope, preferably in 400 to 1100mm scope.Ratio L/R conforms with destination in 0.3 to 0.7 scope, preferably in 0.4 to 0.6 scope.
In another kind of form of implementation, at the region memory of the end in distally at two lock holes that extend transverse to central axis.Produce a plurality of advantages whereby:
A) probability that locks in a plurality of directions;
What b) the mutual relative angle of bone fragments was stable fixes;
C) more advantageously bear moment of flexure and load axial or that reverse.
In another kind of form of implementation, two lock holes that extend transverse to central axis form one 45 ° to 90 ° angle to each other.
In another kind of form of implementation, the end in distally has three lock holes, and wherein intermediary lock hole has different spacings with two other lock holes.The advantage of this set is that the axis neither one of three lock holes can be used as possible rotation axis.This causes a gap that reduces between intramedullary pin and each locking member.
Below by the intramedullary pin of a cannulate method for implantation is described briefly:
Steps A: formulate and keep best reduced operation according to classification of fracture;
Step B: open apparatus by means of one and open pulp cavity, so that inlet angle is with directed consistent with pulp cavity by the surgical technic that adopts;
Step C: insert the length of a guiding steel wire up to terminal location and definite needed intramedullary pin in the future in the distally of intramedullary pin;
Step D: will be assembled in the intramedullary pin of implanting on the handle in advance and insert in the pulp cavity by opening passage via guiding steel wire;
Step e:, intramedullary pin is selected to lock via its locking at axial location and the post-red of checking intramedullary pin.
Description of drawings
Below also to illustrate in greater detail the present invention and further formation of the present invention by the part sketch map of an embodiment.Wherein:
The profilograph of Fig. 1 intramedullary pin; With
Fig. 2 is along the profile of Fig. 1 center line II-II intercepting.
The specific embodiment
Intramedullary pin 1 shown in Fig. 1 and 2 is set and is applied on the tibia.It comprises the end 3 and the central axis 6 that is inserted in the pulp cavity that be applicable in the end 2 of a nearside, a distally.The end 2 of nearside is provided with screwed hole 11, so that a general auxiliary device can be installed.The total length L of intramedullary pin is 255mm.In addition, intramedullary pin has the arch section 4 of a length G=127.5mm, and it has the radius of curvature R of 380mm.Therefore ratio L/R is 0.67.The curvature of intramedullary pin (after implantation of finishing intramedullary pin 1) in plan is equivalent to anatomical intermediolateral plane, that is intramedullary pin 1 is after finishing implantation, direction bending forwards, backwards.
The end 3 in distally constitutes the straight line portion 5 of length " l "=127.5mm.Form one 8 ° angle α between arch section 4 and the straight line portion 5.
In addition, intramedullary pin has vertical hole 7 of a coaxial perforation in central axis 6.
The end 2 of nearside constitutes the straight line portion 8 of length P=75mm, thus P=0.3L.
At two lock holes 9 that extend transverse to central axis 6, one of them constitutes slotted hole, so that can implement compression at the region memory of the end 2 of the nearside of intramedullary pin 1.
At three lock holes 10,12,10 that extend transverse to central axis 6, they are arranged on different radial direction and form one 90 ° angle to each other at the region memory of the end 3 in distally.Wherein intermediary lock hole 12 has different spacings with two other lock holes 10.

Claims (15)

1. intramedullary pin (1) comprises that being applicable to of the end (2) of a nearside, a distally is inserted into an end (3) and the central axis (6) in the pulp cavity, this intramedullary pin
A) has a total length L in 200 to 500mm scopes; And
B) has the arch section (4) of a length G≤L;
It is characterized in that,
C) arch section of length G (4) has a radius of curvature R in the 300-1300mm scope;
D) ratio L/R is in 0.2 to 0.8 scope; And
E) end in distally (3) constitute the straight line portion (5) of " the l "≤L that has length.
2. according to the described intramedullary pin of claim 1 (1), it is characterized in that length " l " is in the scope of 0.2L to 0.55L.
3. according to the described intramedullary pin of claim 2 (1), it is characterized in that length " l " is in the scope of 0.25L to 0.50L.
4. according to claim 2 or 3 described intramedullary pins (1), it is characterized in that, form the angle α in 7 ° of-12 ° of scopes between the tangent line of two end points of arch section (4).
5. according to claim 1 or 2 described intramedullary pins (1), it is characterized in that, constitute non-circular perpendicular to the cross section of central axis (6).
6. according to claim 1 or 2 described intramedullary pins (1), it is characterized in that this intramedullary pin has coaxial vertical hole (7) in central axis (6).
7. according to claim 1 or 2 described intramedullary pins (1), it is characterized in that the end of nearside (2) constitute the straight line portion (8) of length P≤L.
8. according to the described intramedullary pin of claim 7 (1), it is characterized in that the length P of the end of nearside (2) is in the scope of 1/6L to 1/3L.
9. according to claim 1 or 2 described intramedullary pins (1), it is characterized in that, at the region memory of the end (2) of nearside at least one lock hole (9) that extends transverse to central axis (6).
10. according to claim 1 or 2 described intramedullary pins (1), it is characterized in that, at the region memory of the end (3) in distally at least one lock hole (10) that extends transverse to central axis (6).
11., it is characterized in that the radius of curvature R of arch section (4) is in 350 to 1200mm scope according to claim 1 or 2 described intramedullary pins (1).
12., it is characterized in that ratio L/R is in 0.3 to 0.7 scope according to claim 1 or 2 described intramedullary pins (1).
13. according to claim 1 or 2 described intramedullary pins (1), it is characterized in that, at the region memory of the end (3) in distally at two lock holes (10) that extend transverse to central axis (6).
14., it is characterized in that described two lock holes (10) that extend transverse to central axis (6) form one 45 ° to 90 ° angle to each other according to the described intramedullary pin of claim 13 (1).
15., it is characterized in that the end in distally (3) have three lock holes (10,12,10) according to claim 1 or 2 described intramedullary pins (1), wherein intermediary lock hole (12) has different spacings with two other lock holes (10).
CNB200380110566XA 2003-10-21 2003-10-21 Intramedullary nail Expired - Fee Related CN100423700C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2003/000683 WO2005037116A1 (en) 2003-10-21 2003-10-21 Intramedullary nail

Publications (2)

Publication Number Publication Date
CN1859879A CN1859879A (en) 2006-11-08
CN100423700C true CN100423700C (en) 2008-10-08

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ID=34438153

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CNB200380110566XA Expired - Fee Related CN100423700C (en) 2003-10-21 2003-10-21 Intramedullary nail

Country Status (15)

Country Link
US (1) US20060241605A1 (en)
EP (1) EP1675514B1 (en)
JP (1) JP2007508852A (en)
KR (1) KR101136221B1 (en)
CN (1) CN100423700C (en)
AR (1) AR045808A1 (en)
AT (1) ATE462365T1 (en)
AU (1) AU2003269665B2 (en)
BR (1) BR0318527B1 (en)
CA (1) CA2545487C (en)
DE (1) DE50312580D1 (en)
ES (1) ES2340479T3 (en)
NZ (1) NZ546545A (en)
TW (1) TWI340634B (en)
WO (1) WO2005037116A1 (en)

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CA2545487C (en) 2012-05-01
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BR0318527A (en) 2006-09-12
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WO2005037116A1 (en) 2005-04-28
EP1675514A1 (en) 2006-07-05
DE50312580D1 (en) 2010-05-12
NZ546545A (en) 2008-11-28
TW200514541A (en) 2005-05-01
AU2003269665B2 (en) 2008-10-16
ATE462365T1 (en) 2010-04-15
AR045808A1 (en) 2005-11-16
BR0318527B1 (en) 2012-05-02
AU2003269665A1 (en) 2005-05-05
EP1675514B1 (en) 2010-03-31
ES2340479T3 (en) 2010-06-04
US20060241605A1 (en) 2006-10-26
KR20060096431A (en) 2006-09-11
CN1859879A (en) 2006-11-08
CA2545487A1 (en) 2005-04-28

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